function forgotPasswd() {
    showDialog("(￣﹏￣；)", "欸这个嘛...我还没做完呢...(￣﹏￣；)");
}

function closeDialog() {
    $("#dialogMask").fadeOut(400);
}

function checkInputDataCorrect(username, password) {
    if (username == "" || passwd == "") {
        showMessage("用户名和密码都不可以是空的哦");
        return false;
    }

    if (!isLetter(username)) {
        showMessage("用户名只能是大小写字母和数字哦");
        return false;
    }

    if (!isNormalCharacter(passwd)) {
        showMessage("不知道你往密码框都搞了点什么东西...");
        return false;
    }
    return true;
}

function showMessage(message) {
    $("#errMsgBox")[0].innerHTML = `<p>${message}</p>`;
}

function clearMessage() {
    $("#errMsgBox")[0].innerHTML = ``;
}

function showDialog(title, message) {
    html = `<div class="dialogContentBox">
                <div class="titleBox">
                    <p id="title">${title}</p>
                </div><hr>
                <div class="bodyBox">
                    <p id="bodyText">${message}</p>
                </div>
                <div class="bottonBox">
                    <button id="okbtn">知道啦</button>
                </div>
            </div>`;

    dialogMask = $("#dialogMask");

    dialogMask[0].innerHTML = html;
    $(".dialogContentBox .bottonBox #okbtn").click(closeDialog);
    dialogMask.fadeIn(400);
    dialogMask.css("display", "block");
}
